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` UNITED 'STATES PATENT OFFICE.

VALTER N. LOWELL, OF WATERBURY, CONNECTICUT, ASSIGNOF TO THE WATERBURYBRASS COMPANY, OF SAME PLACE.

CARTRIDGE-PRI MER.

SPECIFICATION forming part of Letters Patent No.355,8 77, dated January11, 1887.

Application filed May 24, 1886.

To all whom t may concern.:

Be it known that I, WALTER N. LOWELL, a citizen of the United States,residing at Vaterbury, in the county of New Haven and State ofConnecticut, have invented certain new and useful Improvements inCartridge-Primers; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference beinghad to the accompanying drawing, and to the letters andfigures of reference marked thereon, which forms a part of thisspecification.

" My invention relates to improvements in that class of ammunition knownas cartridgeprimers, and which are provided in the interior thereof witha suitable anvil' and fulminating compound, whereby said primer isexploded in the pocket of the metallic head of a metallicl or papershell in a. manner well known.

' Heretofore much difficulty has been experienced in the construction ofsuch class of primers, owing to thefact that when the primer is struckinto shape small prolongations or irregular ragged projections are leftat the lower edges of the same, which prevent the primer from restinguniformly on all portions of the pocket, and which not unfrequentlycause the bottom of the pocket to be pierced through, rendering theshell unfit for reloading or repriming. Furthermore, the irregularlength of the primer prevents it from resting in the pocket at theproper distance from the outer surface thereof', rendering one side ofthe primer liable to project above the same a sufficient distance tocause a premature discharge of the shell by the sudden closing ofthebreech of the gun against such projecting end.

My improvements have for their object to obviate the abov'efmentionedimperfections and to furnish a primer which will be efficient andreliable at all times.

Serial No. 203.082A (No model.)

To these ends my invention consists, essen-,45 tially, in trimming thelower edges ol' the primer in such manner as to make the same of oneexact and uniform length, and to securea beveled or rounded edge to theouter lower portion thereof, to adapt the same to tit snugly anduniformly within the pocket of the shell, all as will be hereinafterfully described, and specifically designated in the claim.

In the accompanying drawing the gure represented is an enlargedsectional View of my improved primer in position within the pocket of ashell.

Similar letters of `reference indicate like parts.

vIn carrying out my invention the metallic primer A is first struck upinto the usual form. The usual fulminate, foil, and metallic anvil arethen successively adjusted within said primer. The lower edges of theprimer are then cut or trimmed, by means of asuitable tool or tools, toone exact or uniform length, and the lower outer edge finally beveled orrounded inwardly to produce the completed article, as shown in thedrawing.

The primer constructed according to my invention rests snugly anduniformly within the pocket of the cartridge-head, with its upper andlower surfaces in a true line with the depth of said pocket.

Having thus described my invention, I claim as new and useful- 'A newarticle of manufacture consisting of a cartridge-primer having its innerwalls straight, and its inner edge beveled orrounded outward and adaptedto fit in tightly in the inner rounded edge of a pocket formed in theshell, substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

` W'ALTER N. LOWELL.

Witnesses:

E. D. STEELE, J. T. ELTON.

